12621941 has 2 divisors, whose sum is σ = 12621942. Its totient is φ = 12621940.

The previous prime is 12621923. The next prime is 12621949. The reversal of 12621941 is 14912621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12453841 + 168100 = 3529^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 12621941 - 2⁶ = 12621877 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12621941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12621949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310970 + 6310971.

It is an arithmetic number, because the mean of its divisors is an integer number (6310971).

Almost surely, 2^12621941 is an apocalyptic number.

It is an amenable number.

12621941 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621941 is an equidigital number, since it uses as much as digits as its factorization.

12621941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 12621941 is about 3552.7371138321. The cubic root of 12621941 is about 232.8316675449.

The spelling of 12621941 in words is "twelve million, six hundred twenty-one thousand, nine hundred forty-one".